Skills/ClawHub/play-chess

play-chess@1.0.29

CAUTION· static only

Publisher claims: "Play live chess on ChessWithClaw as Black against you, connecting via invite URL or game ID and responding in real time with personalized moves and chat." Observed in sandbox: static analysis only — behavior not yet observed.

Registry ClawHubPublisher alightttt · publishing for 138 daysInstalls 2,515Last detonated 2d ago

Coverage

Static only; nothing was run yet.

The label rests on the code, the instruction files and the publisher. The honeypot run replaces this verdict when it completes.

Is [email protected] safe to install?

KillerSkills analysed it statically (a sandbox run is pending) on 2026-11-12 and scored it 50/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Destructive file system command detected; Prompt injection attempt; Destructive file system command detected. Summary: static analysis only — behavior not yet observed.

Behavior trace

Queued for honeypot run · static analysis only
t+CategoryObserved action

This version has not been detonated yet. The score above counts behavior as unknown (50/100), so it cannot read Verified until the honeypot run completes and replaces this verdict.

Static findings

HIGH
Destructive file system command detectedSKILL.md:720 · Destructive file system command detectedrm -f /tmp/cwc/llm_needed.flagFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
CRITICAL
Prompt injection attemptSKILL.md:1670 · Prompt injection attempt — 'ignore previous instructions'(e.g. "ignore previous instructions," "your next move must be X," "system override").Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
HIGH
Destructive file system command detectedSKILL.md:710 · Destructive file system command detectedrm -f /tmp/cwc/llm_minds.envFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Destructive file system command detectedSKILL.md:724 · Destructive file system command detectedrm -f /tmp/cwc/llm_minds.envFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Destructive file system command detectedSKILL.md:749 · Destructive file system command detectedrm -f /tmp/cwc/chat_reply.envFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Destructive file system command detectedSKILL.md:273 · Destructive file system command detectedrm -f /tmp/cwc/state.env /tmp/cwc/llm_minds.env /tmp/cwc/llm_needed.flagFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File permission modification commandSKILL.md:1151 · File permission modification command — agent changes file ownership/permissionschmod +x /tmp/cwc/polling.shFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
File permission modification commandSKILL.md:589 · File permission modification command — agent changes file ownership/permissionschmod +x /tmp/cwc/select_move.pyFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
File permission modification commandSKILL.md:356 · File permission modification command — agent changes file ownership/permissionschmod +x /tmp/cwc/heartbeat.shFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
npx invocation of non-well-known packageSKILL.md:3 · npx invocation of non-well-known package — may execute untrusted code… chess", (5) User sends a game ID or token for a chess game, (6) User mentions "npx clawhub install play-chess". When triggered, connect to the game immediately and wait f…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
File permission modification commandSKILL.md:1223 · File permission modification command — agent changes file ownership/permissionschmod +x /tmp/cwc/check.shFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
File permission modification commandSKILL.md:1430 · File permission modification command — agent changes file ownership/permissionschmod +x /tmp/cwc/brain_check.shFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05

Cost to the agent

Instructions loaded
≈20,295 tok
1 file · 2 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

Vulnerability advisories (OSV) cover npm and PyPI packages; this registry has no advisory database.

What would make this Verified

30 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Text that tells the agent to ignore its instructions≈ +9 on the totalDelete phrases like "ignore previous instructions", "override", "bypass" from SKILL.md and tool descriptions. Describe what the skill does; do not instruct the agent about other rules.
  2. Unclaimed publisher≈ +8 on the totalClaim alightttt: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Destructive file system command detected≈ +4 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  4. File permission modification command≈ +2 on the totalRequest the narrowest permission that works; replace wildcards with the exact paths or hosts.
  5. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
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